Omron E3X-CIF11, Operation Manual

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13
Overview of DeviceNet Communications Model Section 2-1
Explicit Message
Communications Sending explicit messages to the E3X-DRT21 Communication Unit enables
reading and writing Sensor parameters.
Communications mode Words Communications data Number of
Sensors
Conditions
Remote I/O communications
one-word mode One word in
IN Area Sent to the master:
ON/OFF output signals for up to 13 Sensors.
13 max. ---
Remote I/O communications,
two-word mode Two words in
IN Area Sent to the master:
ON/OFF output signals for up to 16 Sensors.
Number of Sensors able to communicate.
Number of Sensors connected.
16 max.
Remote I/O communications
two-word mode with incident
light level monitoring Two words in
IN Area plus
words for
number of
Sensors con-
nected Sent to the master:
ON/OFF output signals for up to 16 Sensors.
Number of Sensors able to communicate.
Number of Sensors that are connected.
Incident light levels of up to 16 Sensors.
16 max. Incident light
levels cannot
be monitored if
Mobile Con-
sole is con-
nected.
Message Communication data Conditions
Sends EXPLICIT READ
command Reads parameters, including ON/
OFF data, incident light levels, and
thresholds. Cannot be used
when a Mobile
Console is con-
nected.
Sends EXPLICIT WRITE
command Writes parameters, including maxi-
mum sensitivity, and thresholds.
Sends EXPLICIT OPERA-
TION command Performs various operations includ-
ing teaching and fine tuning.
DeviceNet Unit CPU Unit
PLC
Ladder program
CMND(490), etc.
Explicit message
DeviceNet
Fiber Sensors
Unit
1 Unit
2 Unit
13
E3X-DA-N Digital Fiber Amplifier Unit
(Uses Cordless Slave Connector.)
E3X-DRT21 Fiber
Amplifier Sensor
Communication
Unit for DeviceNet